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[Bug tree-optimization/24123] [4.1 Regression] Massive performance regression for -ffast-math due to the recip tree pass
- From: "uros at kss-loka dot si" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 30 Sep 2005 12:44:16 -0000
- Subject: [Bug tree-optimization/24123] [4.1 Regression] Massive performance regression for -ffast-math due to the recip tree pass
- References: <20050929140549.24123.uros@kss-loka.si>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From uros at kss-loka dot si 2005-09-30 12:44 -------
(In reply to comment #12)
> Here is a list of all the differences between the two profiles. r is the time
> with recip, nr is without, nr-r is the difference.
>
> r nr nr-r func
> 1.28 1.50 0.22 pov::sbisect(int,
It looks to me that header is reversed! pov::sbisect is 1.50 _with_ recip.
IMHO header should look:
nr r nr-r func
1.28 1.50 0.22 pov::sbisect(int,
...
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24123